3a^2-7a+6-4a^2-3a+4=

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Solution for 3a^2-7a+6-4a^2-3a+4= equation:


Simplifying
3a2 + -7a + 6 + -4a2 + -3a + 4 = 0

Reorder the terms:
6 + 4 + -7a + -3a + 3a2 + -4a2 = 0

Combine like terms: 6 + 4 = 10
10 + -7a + -3a + 3a2 + -4a2 = 0

Combine like terms: -7a + -3a = -10a
10 + -10a + 3a2 + -4a2 = 0

Combine like terms: 3a2 + -4a2 = -1a2
10 + -10a + -1a2 = 0

Solving
10 + -10a + -1a2 = 0

Solving for variable 'a'.

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-10 + 10a + a2 = 0

Move the constant term to the right:

Add '10' to each side of the equation.
-10 + 10a + 10 + a2 = 0 + 10

Reorder the terms:
-10 + 10 + 10a + a2 = 0 + 10

Combine like terms: -10 + 10 = 0
0 + 10a + a2 = 0 + 10
10a + a2 = 0 + 10

Combine like terms: 0 + 10 = 10
10a + a2 = 10

The a term is 10a.  Take half its coefficient (5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
10a + 25 + a2 = 10 + 25

Reorder the terms:
25 + 10a + a2 = 10 + 25

Combine like terms: 10 + 25 = 35
25 + 10a + a2 = 35

Factor a perfect square on the left side:
(a + 5)(a + 5) = 35

Calculate the square root of the right side: 5.916079783

Break this problem into two subproblems by setting 
(a + 5) equal to 5.916079783 and -5.916079783.

Subproblem 1

a + 5 = 5.916079783 Simplifying a + 5 = 5.916079783 Reorder the terms: 5 + a = 5.916079783 Solving 5 + a = 5.916079783 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + a = 5.916079783 + -5 Combine like terms: 5 + -5 = 0 0 + a = 5.916079783 + -5 a = 5.916079783 + -5 Combine like terms: 5.916079783 + -5 = 0.916079783 a = 0.916079783 Simplifying a = 0.916079783

Subproblem 2

a + 5 = -5.916079783 Simplifying a + 5 = -5.916079783 Reorder the terms: 5 + a = -5.916079783 Solving 5 + a = -5.916079783 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + a = -5.916079783 + -5 Combine like terms: 5 + -5 = 0 0 + a = -5.916079783 + -5 a = -5.916079783 + -5 Combine like terms: -5.916079783 + -5 = -10.916079783 a = -10.916079783 Simplifying a = -10.916079783

Solution

The solution to the problem is based on the solutions from the subproblems. a = {0.916079783, -10.916079783}

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